Packing for bearings.



R. RODERWALD.

PA'CKING FOR BEARINGS.

APPLICATION FILED 3UNE 24.1913.

1,152,223. PatentflAug; 31,1915.

Fig.1.

d 9 4 2 3 5 h f: 0 O 7 Q Q a h M k a v) 8 i C a e 1 e d Inventor" Witnesses 32 l or an Specification of Ztetters Eatcnt.

Patented ea, leis,

Application filled June as, 1913. Seriel'fio. 'i'25,57.

To all 'iiiZO/Liit 72 Be it known that i, 51X? subject of the Duke of [in No. 35 Tempelhofer Ufcr, have invented new and useful l'mprovements in Packings for Bearings, of which the following is a specification. I

T he invention relates to a device for packing bearings for vehicles other appliances, such as shaftings, machinery and the like, which packing is so constructed that the penetration of dust, water or other imurities and the leakage of the lubricant are effectively prevented.

The object of my invention is to produce a tight joint without the application of any soft or fibrous material (which packing substances are liable to become hard will shrivel), merely by the use of packing members of, rfietal or like materials, sliding the one upon the other with their contacti:g faces under a slight pressure, and thus do away with all channels and reduce friction to a minimum. This object is attained by the provision of two packing members positively united but axially displace-able the one with respect tothe other, a spring inserted between the members tending to move them apart in opposite directions, so that they are respectively pressed against stationary and rotating parts of the hearing, such as the casing and the shaft or the axle and the hub barrel, respectively, producing a tight joint by closely bearing on the lateral faces of the said parts. Since the two packing members are also guided the one upon the other with a tight fit, there are no passages from the interior of the bearings to the atmosphere. The packing members are so constructed that attaching and removing of the device can easily and readily be efiected.

The packing is practical particularly by its elasticity and capability of automatic adjustment which insures ing the joint can bear perfectly against each other, and also by the feature that the oint proper is formed only at one place, the diskshaped packing member being so connected with one portion of the bearing that a tight joint is formed between these two parts.

The connection of the two packing members is effected by a, flange provided on the disk, upon which flange a ring or sleeve is guided which fits so tightly over it that no Qilcaa Berlin, Germany,-

that the faces formv flow through the cleft but relative displace ment between. them can occur owing to the action of the spring located between the two parts. One end of this sleeve bears against a dlslcshaped cover-plate mounted on the other part of the bearing and thus packs the bearing. Since ver Y little pressure is required to hold the two surfacesin close contact, in order to form a tight joint, and since these abutting surfaces can be of very small area, only a small amount of friction results. In this device compensation is automatically made for variations in mensions of the hearing which may occur by extension or contraction.

Ell

the di- Three constructional forms of the inven-' auiple illustrated in Figs. 1 to 3, a is shown applied to the bearing of crank axle. The axle l is located in the interior of a. casing 3 rigidly connected. with the cycle-frame. and supported by the ballbearings i and. 5 of the ring type with race groovcs which are held apart by the dis" tancc-sl'eeve 2.

The packing appliances forming the subject-matter of the invention are arranged at the ends of the bearing bracket 3 at 6 and 7, and each packing comprisesa metal disk 0 which is so formed as to admit of the insertion of a leather packing ring d, which is secured in position by a metal ring 6. lhis leather packing ring 61 which fits so tightly in the casing 3 that the metal disk 0 remains stationary with the latter, forms a tight joint at the periphery of the disk q.

The disk 0 has adjacent to its bore an outwardly projecting flange f, which surrounds the axle 1, but does not come into contact with the disk-shaped cover-plates 8 or 9, respectively mounted on the axle. Upon the flange 7' is guided a laterally movable sleeve a which is lightly pressed by a comparatively weak spring 3) against theopposite ,covcr plates 8 or 9, whereby a perfect contact hetweca the abutting faces 15 main gether with the disk .tained in the entire circumference. The reaction of the spring also presses the disks 0 on the outer sides of the bearing rings 4 and 5 respectively and secures them in their proper position. The end face or edge of the sleeve a which bears against the coverplate can be made so small that no appreciable frictional resistance occurs at this place, and on that account the'sleeves a, althoughcontinually bearing against'the walls 8 or 9, do not participate in their rotation but, to-

0, always remain atrest. For this object the said end of the sleeve a may be sharpened or rounded off, as.

illustrated in Fig. i, in order to keep the contracting surface as small as possible. For the same reason the spring I) is only just strong enough to keep the abutting faces of the sleei es 0, in contact with the disks 8 or 9. Moreover, as a special safeguard against rotation the sleeve a may be longitudinally guided upon the extension or flange f of the disk 0 by suitable means, such as groove and key. At the free extremity of the flange 7 an upset border h is formed, while the inner extremity of the sleeve a is provided with a similar but in- Wardly directed annular projection It, by

means of these projections the two packing members a and a are always 1n positive engagement and held together when they are withdrawn from the barrel The spring bears with its one extremity against the disk '0 and acts with its other end upon a. flange i of the sleeve a. The axial displacement of the sleeve a can be obtained either by flat spiral springs, as represented in Figs. 1 and 2, or by a resilient metal. plate or spider having an annular body 5 and a plurality of arms 6 (Figs. 4; and 5).

If desired, the flanges f of the disks 0 can be dispensed with, the sleeves a being then guided by and freely movable in the bore of the disks 0, as shown in Figs. 4 and. 5, in which the disk member a" bears with its flanged edge againstthe lateral face of a bearing ring 51 fixed in a hub barrel 31,

While the sleeve a is axiallv displaceable in the bore of said disk and is acted upon by the spring member 6 and 7F and pressed on the cover 81 attached to the axle. 11. In this-construction both the disk 0 and the sleeve 0; are adapted to slide peripherally on the respective parts with which they are held in closed and tight contact by the spring member and adjusted automatically.

Referring to the modification illustrated in Fig. 6, the packing device consists of a ring 0 f of angular cross-section and a- .sleeve a having ltsouter end enlarged. A

spring 12 inserted between the two members tends to move them apart, thereby pressing them on .thelateral faces of the cone 10 of the ball bearing and of the cover 82 of a .hub 32, respectively. ,In this construct-ion the hub 32 is the rotating part and the axle 21 remains stationary. I have described in the foregoing specification and illustrated in the drawing several constructional embodimentsof my invention .for the purpose of exemplification. Evidently in several Ways, without departing from the principle of the invention. I therefore do not wish to be limited to those constructions, but

What I broadly claim as my invention, and desire to secure by Letters Patent, is:

1. A packing for cylindrical member extending flange at ably fitted upon the cylindrical portion of the first member and also having a radially extending flange, an expansive'spring inhaving a Wide radially 'terposed between the opposed flanges of the said members and tending to move the memthe new device may be modifiedbearings comprising a one end, a member slid- I bers apart, said members also having shallow opposed flanges the said members adapted to act upon them in opposite directions.

- 3. In combination with a bearing having a rotating and a non-rotating part, of a packing for ,said bearing comprising two members spaced apart radially and capable of relative axial movement with respect to each other, one of said members having a radial flange thereon, a packing ring carried by said flange between it and the nonrotating part of the bearing, said members having parts adapted to close the space between them, and means for separating said members axially.

4. In combination with a bearing having a rotating and a non rotatingpart, vof a' packing for said bearing comprising two slidably mounted cylindric members capato limit the'separating movement of said .members.

ble of relative axial movement, said memhers having parts for limiting said movement, one of said members having a radial flange thereon, a packing ring carried by said flange between it and the part of the bearing, and a spring interposed between the said members adapted .to act upon them in opposite directions.

5. In combination With a bearing having a rotating and anon rotating part, of a packing for said bearing comprising two 126 slidably mounted cylindric members, one of said members having a radial flange thereon, a packing ring carried by said flange between it and the non rotating part of said bearing, the other of said members being non rotating adapted to have its edge only contact with;

the rotating part of the bearing and means adapted to force the two packing members axially apart.

6. A packing for bearings comprising two spaced apart cylindric members capable of relative axial movement, one of said members having two flanges, one .fiang'e being adapted to close said space and limit said movement, together with means interposed between the said second flange and the other member adapted to act upon said members in opposite directions tending to force them apart.

.' a packing for said bearing comprising a 7 i In combination with a bearing having a bearing sleeve and a rotating member, of

means for forcing the outer disk member,

disk member tightly against edge of said the inner surface of the bearing sleeve, a

bers adapted to separate them axially, said Copies of this patent may be obtained for five cent Washington, D. 6.

members having parts adapted'to close the space between them and limit their axial separation. j

. 9. In combination with a bearing having a bearing sleeve and a rotating member, of a packing for said bearing comprising-a disk member, means for providing a close fit between the disk member and. the bearing sleeve, a cylindric member capable "of relaative axial movement with respect to the disk member and fitted in close relation thereto, and means adapted to produce a contact between the edge of the cylindric niember and the said rotating member of the bearing.

10. A packing for -bearings comprising two members spaced apart radially and capable of relative axial movement with respect to each other, and means for. separatingsaid members axially, said members having parts adapted to close the space between them, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RUDO'LF RODERWALD.

-Witnesses:

WVOLDEMAR HAUPT, HENRY HASPER.

s'each, by addressing the Gommissioner of Patents, 

